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Sch2102:Atomic Structure Question Paper

Sch2102:Atomic Structure

Course:Bachelor Of Science

Institution: Meru University Of Science And Technology question papers

Exam Year:2013

QUESTION ONE (30 MARKS)
a) Write the postulates of the kinetic molecular theory. (5 Marks) b) Explain the above theory with; i. A 1 molar gas in a box. (5 Marks) ii. Explain the meaning of the terms in the equation PV= nRT. (5 Marks) c) State the diaviation of ideal gas equation using an example of a real gas in a container. (5 Marks) d) A chemical engineer used CO2 gas in cleaning a refrigerator. i. Calculate the density of CO2(g). (3 Marks) ii. Write the number of molecule per litter at (stp). (3 Marks) iii. Find the number of molecules at (rtp). (4 Marks)
QUESTION TWO (20 MARKS)
Given the process below; 33 = 0.46 i. Draw a real set up of the process shown above. (5 Marks) ii. Write the reaction in each electrode. (5 Marks) iii. Calculate the E.M.F the cell if 2+ = 0.34. (5 Marks) iv. Name possible salt bridge and its purpose. (5 Marks)
QUESTION THREE (20 MARKS)
a) Name and explain four factors which influence heat of reaction. (12 Marks)
2
b) i) Calculate the standard heat of function for methane (given heat function for CO2, CH3 and H2O to be -394kJmol-1, -890kJmol-1 and -286kJmol-1 respectively. (6 Marks) ii tate Hess’s aw (2 Marks)
QUESTION FOUR (20 MARKS)
a) Given the standard equations Fe3+(aq) + e- Fe2+(aq) MnO4-(aq) + 8H+(aq) + 5e- Mn2+(aq) + 4H2O(l)
i. Write a cell diagram. (5 Marks) ii. Explain the reaction of the electrodes. (5 Marks)
b) Given that Fe3+(aq)| Fe2+, and MnO4-| Mn2+ is 0 = 0.77, = +1.46. And that the concentrations are 0.25M and 0.004M respectively. Calculate the E.M.F of the cell. (10 Marks)

Sch2102:Atomic Structure Question Paper

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